Two-loop electroweak contributions to $Δr$

Details Two-loop electroweak contributions to $Δr$ Two-loop electroweak contributions to $Δr$

2001-01-23

arxiv.org/abs/hep-ph/0101260v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, including 4 figures. Presented at the 5th International Symposium on Radiative Corrections, (RADCOR-2000), Carmel CA

Scientific paper

A review is given on the quantum correction $\Delta r$ in the $W$--$Z$ mass correlation at the electroweak two-loop level, as derived from the calculation of the muon lifetime in the Standard Model. Exact results for $\Delta r$ and the $W$-mass prediction including ${\mathcal{O}}(\alpha^2)$ corrections with fermion loops are presented and compared with previous results of a next-to-leading order expansion in the top-quark mass.

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